Please answer the following question with explanation
Asked by Deepak
11th September 2018,
12:54 PM
Answered by Expert
Answer:
Figure shows the cross section of wire of radius R.
In order to find the current passing through region between radius R/3 and outer radius R/2,
let us consider a region of inner radius r and thickness dr as shown in figure.
Current dI passing through the above mentioned region is given by, dI = J(r)×A(r) ..................(1)
where J(r) is given current density, A(r) is area of the considered region.
Current I passing through region between inner radius R/3 and outer radius R/5 is , 
Answered by Expert
11th September 2018,
4:59 PM
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